Hey ive owned a Ba mk2 xr6 for about a month now and has the typical overboost problem, the boost gauge(specometer) hits about 10 to 11 then drops back a bit to maybe 8 to 9. Did have a leaky boost gauge when I got it but I fixed the hose on the back of it. Don't really know if its been tuned or not Was wondering if the boost can be manually adjusted ??? The car runs fine in 1st, 2nd and third being able to wind out the gears to well over 5000 rpm but as soon as you bring it on boost in 4th, 5th or 6th it hits the overboost straight away and in extreme cases the car has to be turned off and on again after that the car will run fine again. Will be getting it on a dyno asap but its a bit hard as I work away and only back weekends mainly. Thought if I could manually adjust boost I could see if that was the problem and not something else. Thanks for your help. Aaron. P.S. Car has 205000 klms, completely stock apart from cat back exhaust, motor runs extremely well at idle no noises or anything right through the rev range and pulls very well and is a 6 speed manual. Cheers.